package com.lxp.service.Impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.lxp.dto.DishDto;
import com.lxp.entity.Dish;
import com.lxp.entity.DishFlavor;
import com.lxp.mapper.DishMapper;
import com.lxp.service.DishFlavorService;
import com.lxp.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

/**
 * @author lxp
 * @Motto 每天一行小代码，健康幸福学JAVA：
 * @create 2022-08-24 15:53
 * @Description:
 */

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    /**
     * 新增菜品，同时保存对应的口味数据
     * @param dishDto
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        // 保存菜品的基本信息到菜品表 dish
        this.save(dishDto);
        // 菜品Id
        Long dishId = dishDto.getId();

        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item)->{
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());

        // 保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param ids
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long ids) {
        // 查询菜品基本信息，从dish表查询
        Dish dish = this.getById(ids);

        // 将查询到的基本信息copy到DishDot中
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        // 查询当前菜品对应的口味信息，从dish_flavor 表
        LambdaQueryWrapper<DishFlavor> lqw = new LambdaQueryWrapper<>();
        lqw.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(lqw);
        dishDto.setFlavors(flavors);
        return dishDto;
    }

    /**
     * 修改菜品信息和对应的口味信息
     * @param dishDto
     */
    @Override
    public void updateWithFlavor(DishDto dishDto) {
        // 更新dish基本信息
        this.updateById(dishDto);

        // 清理当前菜对应口味数据 -- dish_flavor表delete操作
        LambdaQueryWrapper<DishFlavor> lqw = new LambdaQueryWrapper<>();
        lqw.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(lqw);

        // 添加当前提交过来的口味数据 -- dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) ->{
          item.setDishId(dishDto.getId());
          return item;
        }).collect(Collectors.toList());

       dishFlavorService.saveBatch(flavors);
    }
}
